[Bug 264238] WiFi stops working after upgrade from 13.0 to 13.1, AR9285

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 27 May 2022 05:50:38 UTC

--- Comment #3 from rkoberman@gmail.com ---
This looks more like a DHCP issue than a wireless one to me.

I see valid DHCP packets sent out with no response. While I suppose it's
possible that it is not tied to wireless. I have no ability to test over a
wired link as I never see this on my home system, only when I travel and no
wired network is available.

I you are seeing this problem and can try a wired interface, please check to
confirm as this may belong in freebsd-net an not freebsd-wireless. Also, can
you do a packet capture when DHCP runs?

The following commands should do the trick. I see outgoing packets, but no
response or any incomint packetsh. This command will put the interface in
promiscuous mode while running.
# tcpdump -i wlan0 -w dhcp-issue.bpf -s0
# service dhclient start wlan0

For the record, I am on 13.1-STABLE on a Lenovo L15 ThinkPad. I have tried both
the internal AX200 (iwlwifi) and the TPlink Realtek 802.11n NIC (urtwn).h

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